GO:1990620 ANPR-A receptor complex: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1990620 describes the ANPR-A receptor complex, a homodimeric guanylyl cyclase receptor expressed in the heart atrium that regulates blood pressure and salt-fluid volume homeostasis.
• The complex is composed of two ANPR-A (NPR1) molecules; ligand binding by atrial natriuretic peptide (ANP) triggers guanylate cyclase activity and elevates intracellular cGMP.
• ANPR-A internalization and trafficking are regulated by cytoplasmic motifs such as the acidic tyrosine-based GDAY motif, which controls receptor sequestration and signaling.
• Clathrin-dependent endocytosis of ANPR-A is a key mechanism that modulates both receptor signaling and metabolic processing.
• Dysregulation of ANPR-A signaling is linked to hypertension, heart failure, and renal disorders, making it a target for cardiovascular research.
• CRISPR-based knockout, knock-in, and overexpression models enable precise interrogation of ANPR-A complex function in cardiovascular and renal biology.
Description
The ANPR-A receptor complex (GO:1990620) is a plasma membrane receptor complex composed of two ANPR-A molecules, primarily expressed in the heart atrium of mammals. It plays a central role in the regulation of blood pressure and salt-fluid volume homeostasis by binding atrial natriuretic peptide (ANP) in response to atrial distension, which leads to guanylate cyclase activation and elevated intracellular cGMP levels. This signaling cascade ultimately reduces blood volume, cardiac output, and systemic blood pressure. Researchers study this complex to understand cardiovascular homeostasis and to develop therapeutic strategies for hypertension and heart failure. The complex is also known as the NPR1 receptor complex, and its function is tightly linked to receptor trafficking and internalization mechanisms.
ANPR-A receptor complex At A Glance
| GO ID | GO:1990620 |
|---|---|
| GO term | ANPR-A receptor complex |
| Ontology | cellular_component |
| Synonym | NPR1 receptor complex |
| Major function | Guanylate cyclase signaling in response to ANP, regulating blood pressure and salt-fluid volume homeostasis |
| Composition | Homodimer of two ANPR-A (NPR1) molecules |
| Tissue expression | Heart atrium in mammals |
| Ligand | Atrial natriuretic peptide (ANP) |
| Downstream effector | Intracellular cGMP elevation |
What Is GO:1990620?
The ANPR-A receptor complex is a cellular component defined as a receptor complex composed of two ANPR-A molecules, expressed in the heart atrium in mammals. It plays a major role in the regulation of blood pressure and salt-fluid volume homeostasis. Binding of the ligand ANP in response to atrial distension (high blood volume) leads to guanylate cyclase activity of the ANPR-A receptor complex, thereby elevating intracellular cGMP levels. The end result is a reduction in blood volume and, therefore, a reduction in cardiac output and systemic blood pressure.
Why Is ANPR-A receptor complex Important in Cell Biology?
The ANPR-A receptor complex is a critical regulator of cardiovascular homeostasis, and its dysfunction is implicated in hypertension, heart failure, and renal disorders. Understanding its assembly, trafficking, and signaling provides insights into blood pressure regulation and offers potential therapeutic targets for cardiovascular diseases.
• Regulates blood pressure and salt-fluid volume homeostasis through cGMP signaling.
• Expressed in the heart atrium and responds to atrial distension.
• Internalization and trafficking are regulated by cytoplasmic motifs such as GDAY.
• Clathrin-dependent endocytosis modulates receptor signaling and metabolic processing.
• Dysregulation is associated with hypertension and heart failure.
• Serves as a target for natriuretic peptide-based therapeutics.
• Involved in oocyte meiotic resumption in bovine models, indicating broader reproductive roles.
• Receptor stoichiometry has been characterized in bovine zona glomerulosa.
• Brain natriuretic peptide can downregulate P2X3 receptors, showing crosstalk with other signaling pathways.
• CRISPR models enable precise functional dissection of ANPR-A complex in disease.
What Happens During ANPR-A receptor complex?
Ligand Binding and Activation
In simple terms: When the heart atrium stretches due to high blood volume, it releases a hormone that binds to the receptor complex, turning it on.
In response to atrial distension, atrial natriuretic peptide (ANP) binds to the ANPR-A receptor complex, inducing a conformational change that activates its guanylate cyclase domain. This binding is the initial step in a signaling cascade that elevates intracellular cGMP levels.
Guanylate Cyclase Activation and cGMP Production
In simple terms: The activated receptor produces a small molecule called cGMP, which acts as a signal to reduce blood volume.
Upon ligand binding, the ANPR-A receptor complex catalyzes the conversion of GTP to cGMP, leading to elevated intracellular cGMP levels. This second messenger mediates the physiological effects of ANP, including vasodilation and natriuresis.
Receptor Internalization and Trafficking
In simple terms: After signaling, the receptor is pulled into the cell to be recycled or degraded, which controls how long the signal lasts.
ANPR-A undergoes internalization and trafficking, processes regulated by cytoplasmic motifs such as the acidic tyrosine-based GDAY motif. Clathrin-dependent endocytosis is a key mechanism for receptor internalization and metabolic processing. These trafficking events modulate the duration and intensity of ANPR-A signaling.
Physiological Outcome: Blood Pressure Reduction
In simple terms: The final result is that the body gets rid of excess salt and water, lowering blood pressure.
The end result of ANPR-A receptor complex activation is a reduction in blood volume, cardiac output, and systemic blood pressure. This homeostatic function is critical for maintaining salt-fluid balance.
Key Genes Involved in GO:1990620 ANPR-A receptor complex
The following genes and proteins are key components or regulators of the ANPR-A receptor complex and its signaling pathway.
| Gene | Major Role | Research Relevance |
|---|---|---|
| NPR1 | Encodes ANPR-A receptor; forms homodimer | Core component of the complex; target for knockout and knock-in studies |
| NPPA | Encodes atrial natriuretic peptide (ANP) | Ligand for ANPR-A; regulates blood pressure |
| NPPB | Encodes brain natriuretic peptide (BNP) | Ligand with similar effects; can downregulate P2X3 receptors |
| NPR2 | Encodes ANPR-B receptor | Related guanylyl cyclase receptor; potential heterodimer partner |
| NPR3 | Encodes clearance receptor | Regulates natriuretic peptide availability |
| GUCY1A3 | Guanylate cyclase subunit | Downstream cGMP signaling |
| GUCY1B3 | Guanylate cyclase subunit | Downstream cGMP signaling |
| PRKG1 | cGMP-dependent protein kinase | Mediates cGMP effects |
| P2RX3 | P2X3 receptor | Downregulated by BNP; crosstalk with natriuretic peptides |
| CLTC | Clathrin heavy chain | Mediates clathrin-dependent internalization of ANPR-A |
| ARRB1 | Beta-arrestin 1 | Regulates receptor internalization and signaling |
| ARRB2 | Beta-arrestin 2 | Regulates receptor internalization and signaling |
| DNM2 | Dynamin 2 | Required for endocytosis of ANPR-A |
| RAB5A | Early endosome marker | Trafficking of internalized ANPR-A |
| RAB7A | Late endosome marker | Trafficking of internalized ANPR-A |
| SLC9A3R1 | NHERF1 | Scaffolding protein that interacts with ANPR-A |
| GNAI2 | G protein alpha i2 | Modulates ANPR-A signaling |
| PDE5A | Phosphodiesterase 5A | Degrades cGMP, regulating ANPR-A signaling |
How Is ANPR-A receptor complex Regulated?
The ANPR-A receptor complex is regulated at multiple levels, including ligand availability, receptor internalization, and trafficking. Internalization and trafficking of ANPR-A are regulated by an acidic tyrosine-based cytoplasmic motif GDAY. Clathrin-dependent internalization, signaling, and metabolic processing of ANPR-A have been characterized, showing that receptor endocytosis is a key regulatory mechanism. Additionally, receptor sequestration and internalization dynamics have been studied in detail. These regulatory processes control the duration and intensity of ANP signaling, thereby modulating blood pressure homeostasis.
ANPR-A receptor complex and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| NPR1 | Hypertension, heart failure | NPR1 knockout mouse; CRISPR point mutation |
| NPPA | Atrial fibrillation, hypertension | NPPA knockout; overexpression models |
| NPPB | Heart failure, cardiac hypertrophy | NPPB knock-in; CRISPR activation |
| P2RX3 | Pain, sensory signaling | P2RX3 knockout; BNP treatment |
| CLTC | Endocytosis defects | CLTC knockout; internalization assays |
Hypertension and Cardiovascular Disease
Dysregulation of ANPR-A receptor complex signaling is associated with hypertension and heart failure. The complex plays a major role in the regulation of blood pressure and salt-fluid volume homeostasis, and its dysfunction can lead to elevated blood pressure. Mutations or altered expression of NPR1 have been linked to cardiovascular disorders.
Renal Disorders
The ANPR-A receptor complex is expressed in the kidney and regulates sodium and water excretion. Impaired signaling can contribute to renal disorders characterized by salt retention and volume overload.
Reproductive Biology
Natriuretic peptides stimulate oocyte meiotic resumption in bovine, suggesting a role for ANPR-A signaling in reproductive processes. This indicates potential broader physiological functions beyond cardiovascular homeostasis.
From ANPR-A receptor complex-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does NPR1 loss affect blood pressure regulation? | NPR1 knockout mouse or CRISPR KO cell line |
| How do point mutations in NPR1 affect guanylate cyclase activity? | CRISPR point mutation knock-in in HEK293 or cardiomyocytes |
| What is the effect of NPR1 overexpression on cGMP levels? | NPR1 overexpression lentiviral model |
| How does tagged NPR1 behave in trafficking studies? | Tagged knock-in (e.g., GFP-NPR1) via CRISPR |
| Which proteins interact with ANPR-A complex? | Proteomics with tagged knock-in |
| Can CRISPR library screening identify regulators of ANPR-A signaling? | Genome-wide CRISPR knockout library in reporter cells |
How to Study the ANPR-A receptor complex Process
| Method | What It Measures | Typical Application |
|---|---|---|
| cGMP immunoassay | Intracellular cGMP levels | Assessing ANPR-A activation |
| Radioligand binding | Receptor-ligand interaction | Measuring ANP binding affinity |
| Immunofluorescence | Receptor localization | Internalization and trafficking |
| Cell surface biotinylation | Surface receptor levels | Internalization kinetics |
| Co-immunoprecipitation | Protein-protein interactions | Identifying complex components |
| Mass spectrometry | Proteomic profiling | Interactome analysis |
| CRISPR knockout library | Gene function | Identifying regulators of ANPR-A signaling |
| RNA-seq | Transcriptional changes | Downstream effects of ANPR-A activation |
Biochemical Assays for cGMP
cGMP levels can be measured using enzyme immunoassays or mass spectrometry to assess ANPR-A receptor complex activity upon ligand stimulation.
Receptor Internalization Assays
Internalization and trafficking of ANPR-A can be studied using radioligand binding, immunofluorescence, and cell surface biotinylation.
Proteomics and Interactomics
Affinity purification coupled with mass spectrometry can identify proteins interacting with the ANPR-A receptor complex, revealing novel regulatory components.
CRISPR Screening
Genome-wide CRISPR knockout or activation screens can identify genes that modulate ANPR-A signaling and cGMP production.
How CRISPR Can Be Used to Study GO:1990620 ANPR-A receptor complex
Knockout
CRISPR knockout of NPR1 or other components of the ANPR-A receptor complex can abolish signaling, providing a clean background to study its role in blood pressure regulation and cGMP production.
Point Mutation
Point mutations in NPR1, such as those in the guanylate cyclase domain or the GDAY motif, can be introduced using CRISPR to dissect structure-function relationships and trafficking defects.
Knock-in
Knock-in of tagged NPR1 (e.g., GFP or HA) allows real-time imaging and biochemical tracking of the ANPR-A receptor complex in live cells.
Overexpression
Overexpression of NPR1 via CRISPR activation or lentiviral delivery can enhance ANPR-A signaling, useful for studying gain-of-function effects and cGMP-mediated responses.
How EDITGENE Supports ANPR-A receptor complex Research
Researchers studying ANPR-A receptor complex-related genes often need to determine whether a candidate gene is causally involved in cardiovascular homeostasis or disease. EDITGENE provides a comprehensive suite of CRISPR services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for ANPR-A receptor complex research.
Frequently Asked Questions About ANPR-A receptor complex
What is the ANPR-A receptor complex?
The ANPR-A receptor complex (GO:1990620) is a homodimeric receptor composed of two ANPR-A molecules, expressed in the heart atrium, that regulates blood pressure and salt-fluid volume homeostasis via cGMP signaling.
What genes are involved in the ANPR-A receptor complex?
Key genes include NPR1 (encoding ANPR-A), NPPA (ANP ligand), and downstream effectors such as GUCY1A3 and PRKG1.
Where is the ANPR-A receptor complex expressed?
It is primarily expressed in the heart atrium in mammals, but also found in kidney and other tissues.
What is the function of the ANPR-A receptor complex?
It binds ANP in response to atrial distension, activates guanylate cyclase, elevates cGMP, and reduces blood volume and systemic blood pressure.
How is the ANPR-A receptor complex regulated?
It is regulated by ligand availability, internalization via clathrin-dependent endocytosis, and trafficking motifs such as the GDAY motif.
What diseases are associated with ANPR-A receptor complex dysfunction?
Dysfunction is linked to hypertension, heart failure, and renal disorders.
What research methods are used to study the ANPR-A receptor complex?
Common methods include cGMP assays, radioligand binding, immunofluorescence, proteomics, and CRISPR screening.
Can CRISPR be used to study the ANPR-A receptor complex?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are powerful tools to dissect ANPR-A function.
What is the synonym for ANPR-A receptor complex?
The synonym is NPR1 receptor complex.
What is the GO ID for ANPR-A receptor complex?
The GO ID is GO:1990620.
Conclusion
The ANPR-A receptor complex (GO:1990620) is a central regulator of cardiovascular homeostasis, mediating the effects of atrial natriuretic peptide through cGMP signaling. Its dysfunction is implicated in hypertension and heart failure, making it a key target for therapeutic development. Advanced CRISPR models and biochemical assays continue to unravel its complex biology, offering new opportunities for intervention.
References
- 1. Mani I et al.. 2019. Emerging concepts of receptor endocytosis and concurrent intracellular signaling: Mechanisms of guanylyl cyclase/natriuretic peptide receptor-A activation and trafficking.. Cell Signal 60:17-30 PMID: 30951863
- 2. Pandey KN. 2005. Internalization and trafficking of guanylyl cyclase/natriuretic peptide receptor-A.. Peptides 26(6):985-1000 PMID: 15911067
- 3. Pandey KN. 2001. Dynamics of internalization and sequestration of guanylyl cyclase/atrial natriuretic peptide receptor-A.. Can J Physiol Pharmacol 79(8):631-9 PMID: 11558671
- 4. Somanna NK et al.. 2018. Clathrin-dependent internalization, signaling, and metabolic processing of guanylyl cyclase/natriuretic peptide receptor-A.. Mol Cell Biochem 441(1-2):135-150 PMID: 28900772
- 5. Rondeau JJ et al.. 1995. Stoichiometry of the atrial natriuretic factor-R1 receptor complex in the bovine zona glomerulosa.. Biochemistry 34(7):2130-6 PMID: 7857923
- 6. Marchenkova A et al.. 2015. Brain natriuretic peptide constitutively downregulates P2X3 receptors by controlling their phosphorylation state and membrane localization.. Mol Pain 11:71 PMID: 26576636
- 7. Pandey KN et al.. 2005. Internalization and trafficking of guanylyl (guanylate) cyclase/natriuretic peptide receptor A is regulated by an acidic tyrosine-based cytoplasmic motif GDAY.. Biochem J 388(Pt 1):103-13 PMID: 15574117
- 8. De Cesaro MP et al.. 2015. Natriuretic peptides stimulate oocyte meiotic resumption in bovine.. Anim Reprod Sci 159:52-9 PMID: 26051611
